Improvement in machines for polishing metal tubes



J. A. THOMAS.

Boring Metal rTubes. No. 61,894. Patentedi Feb.75, 1867.`

NPEIERS FMOTO-UTHOGRAPHER. WASHINGYON. D C.

@eine tstes gatwt @fgt-gf` JOHN A. THOMAS, OF BUFFALO, NEW YORK, ASSIGNORTO HIMSELF' AND HENRY4 J. MILLER, OF DUNKIRK, NEW YORK.

Letters Patent No. 61,894, dated February 5, 1867.

@In Stintino referrer tu in tlgtst tcttets tttut ma taking prut nt the time i 'ro ALL WHoM rr MAY conocen:

Be it known that I, Jenn A. THOMAS, of the city of Buffalo, county of Erie, and State of New York, have inventeda new and improved Machine for Roaming andPolishing Metal Tubing for Pumps, and other purposes; and I do hereby declare that the following is a tull and exact description thereof, reference being had to the accompanying drawings.v

Figure l is a central longitudinal section.

Figure 2 is an end elevation.

Figure 3 is a detached section of one of the clamping sockets.`

Figure 4 is a detached view of one of the mandrels and cutters, m c.

Figure 5 is un elevation of a portion of the middle bearing-frame K attached, showing the boxes L for the tubes.

Like letters designate correspondingparts in all of the figures. 4

My invention has for its object the reaming and polishing of tubing for pump barrels and other purposes ina cheap and expeditious manner, and consists in the combination and arrangement of a series of stationary mandrcls on a sliding frame with a corresponding series of the tubes to be roamed, so supported and connected by and with the frame and driving mechanism as to revolve rapidly around the nnamirels while the latter are fed to the same, as hereinafter set forth. i

A is a horizontal bed-frame, supported on. standards or otherwise, to which is attached theupri'ght supportl ing frame B, which is preferably of circular form, as shown in tig 2. In the'centre of this frame is hung, in u suitable 'box or bearing, the' arbor C, provided withtivo gear-wheels, D E; the former for receiving motion from a driving-pinion, I, on the shaft of the cone-pulley G; the latter being of greater size for imparting rapid motion to the several pinions, H H, arranged at equal intervals around and meshing with it. Each of the lastnamed pinions is xcd to an arbor, which has vits hearing in the frame B, through which it extends, and is provided on its opposite end with a screw socket, J, fitted to receive the male end of the tube or pipe I. As pipes of this description are usually provided with ascrew at one end for connecting the sections together, it is only required that sockets for the pinions should be providedto t the various sizes of pipe tothe` roamed; but when the pipe is not so providcd'itmay be heldin the socket by clamping it by set-screws z' t', aslshown in iig 3. The 'pipes I I are furnished with bearings at their opposite ends by means of the circular bearing-frame K, igs. 1 and 2. This frame is provided with apertures corresponding in number and position with the pipes, through which they pass freely, and are received in the boxs L L, which are bolted to the outer side ofthe frame. The ends of the pipes iit snugly, butturn in these boxes, which hold them steadily and prevent vibra tion while revolving. The frame K is adjustable on the bed-frame to adapt it to receiving pipes of diiferent lengths. The mandrels'fmmy are rigidly secured at their further ends to a frame or carriage, VO, (iig. 1,) being arranged in positions which correspond with those of' the pipes I I. This carriage slides on Waysof the frame A, being fed by the screw of the revolving arbor The mandrels m are provided with burrs or cutters, which are screwed or otherwise attached to the ends, as at c, fig. 4. As the tubes I are rapidly revolved around these stationary cutters, they are roamed or bored out'smoothly as fast as they are fed through by theadvancing of the carriage O. When bored through, the' carriage O is run back, withdrawing the mandrels, when the tubes are unscrewcd from the pinion sockets and reuioved, a new set being inserted in their place. In this simple mannertwelvc pieces of tubing, or more or less, according to the size of the machine, may be bored in the time ordinarily required to bore one. For some purposes the tubes `require polishing on their interiors also. This is effected in the saine machine by removing the burr cutters c from the mandrels, and substituting a polishing head inthe place of each. The polishing head is composed of a screw shank, fitting into the end of the mandrels, having a head upon which are ttcd'scvcral spring-plates, held by a ring chuck, or its equivalent. These plates are provided at their ends with leather buffers for scouring. The speed of rotation may be increased by changing the driving-belt on thc conc-pulley, and, by the united pressure of the several springs, the polishing l isvery rapidly and eil'ectually done. The entire arrangement and construction of the` machine is productive of the Vresult arrived at by the invention, viz, the cheap and' rapid roaming and polishing of metal tubing as it is simple, compact. and not liable to get out of order by use. l

What I claim as my invention, and desire to secure by Letters Patent, is* The combina-tion of the series of stationary cutter mandrels m m, on thc sliding carriage O, with the pinions H H, and their sockets jj, adjustable bcm-ing-frame K, and driving-wheels D E, arranged :md operating substantially in the manner and for the purpose set forth.

In witness vwhereof I have hereunto sgned my name in the presence of two subscribing Witness es.

JOHN A.' THOMAS.

Witnesses JM HYATT, ALBERT HAIGHT. 

